UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 14, 2012

Industrial Income Trust Inc.

(Exact name of registrant as specified in its charter)

518 Seventeenth Street, 17^th Floor

Denver, CO 80202

(Address of principal executive offices)

(303) 228-2200

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 2.02 Results of Operations and Financial Condition.

Industrial Income Trust Inc. (the “Company”) is providing certain information in a supplemental document entitled “Supplemental Reporting Package for the Quarter Ended December 31, 2011” (the “Supplemental Reporting Package”), which sets forth additional disclosure regarding the Company’s results of operations and financial performance for the quarter ended December 31, 2011. The Supplemental Reporting Package supplements the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on March 9, 2012. The Supplemental Reporting Package will be made available on the Company’s website (www.industrialincome.com) and is attached as Exhibit 99.1 to this Current Report on Form 8-K. The information in this Item 2.02 and the attached Exhibit 99.1 is deemed to have been furnished and shall not be deemed to be “filed” under the Securities Exchange Act of 1934, as amended.

Item 8.01. Other Events.

Public Earnings Call

Industrial Income Trust Inc. (the “Company”) will host a public conference call on Tuesday, March 20, 2012 to review quarterly operating and financial results for the quarter ended December 31, 2011. Evan Zucker, Chairman, Dwight Merriman, Chief Executive Officer, and Tom McGonagle, Chief Financial Officer, will present the operating and financial data and discuss the Company’s corporate strategy and acquisition activity. The conference call will take place at 3:15 p.m. EDT and can be accessed by dialing (800) 409-0068. To access a replay of the call, contact Dividend Capital at (866) 324-7348.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements that are based on the Company’s current expectations, plans, estimates, assumptions, and beliefs that involve numerous risks and uncertainties, including, without limitation, those risks set forth in the “Risk Factors” section of the Company’s Annual Report on Form 10-K for the year ended December 31, 2011, as filed with the SEC. Although these forward-looking statements reflect management’s belief as to future events, actual events or our investments and results of operations could differ materially from those expressed or implied in these forward-looking statements. To the extent that the Company’s assumptions differ from actual results, the Company’s ability to meet such forward-looking statements may be significantly hindered. You are cautioned not to place undue reliance on any forward-looking statements. The Company cannot assure you that it will attain its investment objectives.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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EXHIBIT INDEX